Refrigeration & Air-Conditioning MCQ Question with Answer

Question No : 57
The capillary tube is not used in large capacity refrigeration systems because

Question No : 58
An evaporator is also known as

Question No : 59
The unit of thermal diffusivity is

Question No : 60
The vapour compression refrigerator employs the following cycle

Question No : 61
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Question No : 62
The alignment circle is marked on the psychrometric chart at

Question No : 63
Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation)